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arXiv 2302.07205math.OC
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噪声函数的逐次线性规划算法的收敛性

Convergence of Successive Linear Programming Algorithms for Noisy Functions

Christoph Hansknecht, Christian Kirches, Paul Manns

摘要:

基于约束的方法已经非常成功地解决了各种无约束和有约束的非线性最优化问题。然而,在诸如最优控制或机器学习的实际应用中,必要的函数和导数信息可能被噪声破坏。Sun和Nocedal最近提出了一种通过稳定计算迭代的接受准则来解决光滑无约束问题的方法,这导致了信赖域方法的迭代收敛到临界区域,Sun和Nocedal(2022)。我们将他们的分析扩展到Byrd等人(2023 a,2023 b)的连续线性规划算法,用于无约束最优化问题,其目标可以描述为多面体函数与光滑函数的组合,其中后者及其梯度可能会被噪声破坏。这提供了覆盖例如图像重建或约束优化算法产生的(子)问题的灵活性。我们提供的计算实例,说明的结果和点的稳定参数,平衡的临界区域的大小与放宽的接受标准(或下降属性)的算法的实际确定的可能的策略。

英文摘要:

Gradient-based methods have been highly successful for solving a variety of both unconstrained and constrained nonlinear optimization problems. In real-world applications, such as optimal control or machine learning, the necessary function and derivative information may be corrupted by noise, however. Sun and Nocedal have recently proposed a remedy for smooth unconstrained problems by means of a stabilization of the acceptance criterion for computed iterates, which leads to convergence of the iterates of a trust-region method to a region of criticality, Sun and Nocedal (2022). We extend their analysis to the successive linear programming algorithm, Byrd et al. (2023a,2023b), for unconstrained optimization problems with objectives that can be characterized as the composition of a polyhedral function with a smooth function, where the latter and its gradient may be corrupted by noise. This gives the flexibility to cover, for example, (sub)problems arising image reconstruction or constrained optimization algorithms. We provide computational examples that illustrate the findings and point to possible strategies for practical determination of the stabilization parameter that balances the size of the critical region with a relaxation of the acceptance criterion (or descent property) of the algorithm.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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